package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;


    /**
     * 删除分类,删除之前  需要三思而后行
     * 需要考虑一下被删除是否关联其他东西
     * @param id
     */
    @Override
    public void remove(Long id) {
        //根据id查询 菜品下面是否有内容 返回行数
        LambdaQueryWrapper<Dish> dishLqw=new LambdaQueryWrapper<>();
        dishLqw.eq(Dish::getCategoryId,id);
        int count = dishService.count(dishLqw);
        if (count>0){
            throw new CustomException("当前分类下关联了菜品,不能删除");
        }

        //查询套餐下是否有内容
        LambdaQueryWrapper<SetmealDish> setmealLqw=new LambdaQueryWrapper<>();
        setmealLqw.eq(SetmealDish::getSetmealId,id);
        int count1 = setmealService.count(setmealLqw);
        if (count1>0){
            throw new CustomException("当前套餐下关联了菜品,不能删除");
        }
        //菜品和套餐下都没有内容,可以直接删除
        super.removeById(id);
    }
}
